Feet and Inches Length Measurement Calculator

Add and subtract inches (as a decimal or fraction), feet, centimeters and millimeters. For example enter a value such as 6' 8 5/16" + 12cm. Results are converted to inches, feet, centimeters, and millimeters automatically and measurements are displayed in imperial and metric.

Calculating inches, inch fractions, feet and centimeters

Results Converted to Inches, Feet, Millimeters, and Centimeters

0"

Imperial Units

0 Inches (fraction)
0 Inches
0 Feet

Metric Units

0 Millimeters
0 Centimeters
0 Meters
Adding inches and centimeters with a tape measure and calculator

Adding Measurements Including Feet, Inches, and Centimeters

  • Easily add, subtract, multiply, and divide both imperial and metric measurements using as many values as you want.
  • Use normal math and type your calculation just like you would write it on a piece of paper.
  • Accepts inch, foot, centimeter, and millimeter symbols, abbreviations, singular, or plural names.
  • Mix and match both metric and imperial measurements. Add or subtract inches, inch fractions, feet, yards, millimeters, centimeters, and meters in any combination.
  • Calculate length and get measurements in feet and inches, inches with fraction, inches as a decimal, millimeters, centimeters, and meters for easy conversion.
  • Round feet and inch decimals to the nearest inch fraction measurement and get the decimal measurement for an inch fraction.
  • Convert feet and inches to meters and centimeters and vice-versa. Convert other measurements easily with our length unit conversion calculator.

Inch Fraction and Decimal Equivalents

Find some common inch fractions and their decimal values using our fraction chart.
Use the inch fraction to decimal inches conversion chart to see the decimal values for every inch fraction

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